Dr Seuss's Horton Hears a Who

The people behind Ice Age have done a lovely job of animating the elasticated world of Dr Seuss. Jim Carrey provides the voice of the lolloping elephant Horton who discovers a city on a speck of dirt and becomes its protector, reasoning that "a person's a person, no matter how small". It's a charmingly dopey creation (though, creepily, the animators have given the elephant Carrey's tombstone-tooth grin) and the anarchic mini-city Who-Ville is giddily madcap. But Seuss's story takes about 10 minutes to read, and there's the rub: where to go with the remaining 70 minutes. In places, the add-ins are properly barmy - best of all when Who-Ville's hand-wringing mayor (Steve Carrell) gets jabbed in the arm with anaesthetic by the dentist. Elsewhere, it's drearily conventional. Watch the dumpy elephant cross a rickety rope bridge. Will it break? What do you think? But kids won't let that stop them.